.import{
    width: 10rem;//10rem

    @width: 5rem;
    @height:@width/2 rem;
    .variable{
        width: @width;
        height: @height;
        border: 1px solid red;
    }
    .bordered{
        border-top: 1px solid yellow;
        border-bottom: 2px solid blueviolet;
    }
    .mixins{
        background-color: cornsilk;
        .bordered();
    }
    .nesting{
        background-color:lightsalmon;
        div:last-child{
            background-color:saddlebrown
        }
    }

}